Product Description: This product comes as a kit connected into the 700 R4 torque converter lock-up system. It is used to control the lock-up time, based on the vehicle speed, between 30-90 mph. This kit eliminates lock and unlock cycling and premature or unwanted lock-up, which in turn, may reduce or avoid engine lugging and spark knock after getting into 4th gear. The dial control shown in the photo is used to adjust the speed in mph of lockup. When the green light is on, the torque converter clutch is locked up. When the red light is on, the torque converter clutch is off. The control should be located in a spot where it can be adjusted while driving. In the 1937 Ford the control was located on the left side of the center console.Back to Parts